Fluid pressure Flashcards
1
Q
how does atmospheric pressure change
A
it is created on surface by colliding air molecules, as altitude increases atmospheric pressure decreases as less dense so fewer molecules collide with surface and fewer above surface so weight decrease with altitude
2
Q
what is the pressure of the fluid due to
A
density - more particles in volume so collide pressure higher
depth - number of particles above point increase so weight increase increasing fluid pressure
3
Q
explain how fluid pressure is exerted
A
in right angles to surface in contact w fluid
4
Q
give me an example of how pressure is related to force and area
A
sole of high heels have small area so exert large pressure on ground damaging floor
5
Q
what is the units of pressure
A
pascals
